Which US-originated sport is popular in Canada?
Ice hockey is an American founded sport. However, it is extremely popular in Canada. Many of the National Hockey League players in the United States are actually from Canada.
The most popular sport by far in Canada is hockey at the professional, amateur and even unorganized levels. The Canadian Football league is the second most popular spectator sport and subsequently American style football has become very popular at the high school level as well. Lacrosse is actually the country's National sport, but it's popularity is not at the level it was in the 19th century. Basketball, baseball and soccer are some other popular sports…
Canada has many of the same sports as the United States: baseball is very popular, and so is basketball. Canadians enjoy football (although Canadian football rules are slightly different from those in the United States), and they are also fond of a sport called curling. But the most popular sport in Canada is probably ice hockey.
Hockey is an international sport, not exclusive to one country. Many claim that ice hockey, a variant now popular there, was also invented in one of the regions, but there are other conflicting accounts and nobody knows for sure. Suffice to say, it is popular enough to be considered a sport of Canada.